Lichens

As flowers start to fade and leaves begin to fall my thoughts often turn to lichens, mosses and all of the other beautiful things you can still find in nature in the winter. We’ve had two or three days of drizzle; nothing drought busting but enough to perk up the lichens. Lichens like plenty of moisture, and when it doesn’t rain they will simply dry up and wait. Many change color and shape when they dry out and this can cause problems with identification, so serious lichen hunters wait until after a soaking rain to find them. This is when they show their true color and form. The pink fruiting bodies of the pink earth lichen in the above photo for example, might have been shriveled and pale before the rain.

Pink earth lichen (Dibaeis baeomyces) closely resembles bubblegum lichen (Icmadophila ericetorum.) One of the differences between the two is the length of the stalks that the plump pink apothecia sit on. They are longer on bubblegum lichen than they are on pink earth lichens. Both are very beautiful things that are rarely seen in this area. The whitish thallus, or body of the lichen, grows on soil; usually on dry acidic soil near blueberry and sweet fern plants.

Bright orange poplar sunburst (Xanthomendoza hasseana) is a beautiful lichen with its large disc shaped, sucker like fruiting bodies (apothecia) which are almost always showing. It’s found on tree bark and provides a lot of color in winter when there are no flowers to see.

Another sunburst lichen, the elegant sunburst (Xanthoria elegans) was exposed to ultraviolet radiation, cosmic radiation, and the vacuum of space for one and a half years and when it was brought back to earth it grew on as if nothing had happened. Many believe that lichens are virtually indestructible and are therefore as close to immortal as any earth based life form can be.

British soldier lichens (Cladonia cristatella) like to grow on damp wood like rotted stumps and logs, but I’ve found them on buildings, fence posts, and built up forest litter on boulders. At this time of year I don’t pass too many mossy old tree stumps without having a glance for British soldiers.

Scattered rock posy lichen (Rhizoplaca subdiscrepans) is both beautiful and unusual with its brain like body (Thallus) and orange fruiting discs (Apothecia.) This one was growing on stone in full sun. It is about as big as a quarter now, but when I first met it years ago it was about the size of a penny.

Lichen identification can sometimes be tricky. Though it resembles scattered rock posy I think this is rosy saucer lichen (Ochrolechia trochophora.) It was growing on stone, but even though the book Lichens of North America says that it grows on tree bark a little further research on the website Images of British Lichens shows that it grows on tree bark or stone. Based on that information and the fact that I can’t find a similar saucer lichen that grows in New England, I’m going with rosy saucer lichen. Even though it has rosy in its name its apothecia can range from pink to orange, according to what I’ve read.

It didn’t work out very well but I put a nickel behind these pixie cup lichens (Cladonia asahinae) to give you an idea of how small they are. The photo came out looking like golf tees in front of a full moon. A nickel is .83 inches in diameter and the round cup of the golf tee shaped pixie cup might be .12 inches on a good day. You wouldn’t fit an average pea in the cup, but a BB from an air rifle might sit in one.

I had to really push my camera to get this shot so I could show you the inside of the cup of a pixie cup lichen. The nearly microscopic red dots on the rim of the cup are this lichen’s fruiting bodies (Apothecia.) The tan colored scales are leafy growths called squamules. A squamule is a lobe of the body of the lichen (Thallus,) and some lichens are squamulose, meaning they’re made up of small, leafy lobes. I’m not sure what the objects in the cup are, but they’re extremely small.

Powdery sunburst lichen (Xanthomendoza ulophyllodes) was growing on a stone. This foliose lichen is easy to see, even when it’s small, because of its bright orange yellow color. This lichen really likes moisture and is often found growing near channels that carry water on stone or bark. This one was about the size of an average aspirin. Lichens are a good indicator of air quality, so if you aren’t seeing them you might want to check into your local air quality.

Lichens like the common goldspeck lichen (Candelariella vitellina) in the above photo are here year round for us to enjoy, and once the leaves fall many lichens become even easier to see. Look for this bright yellow crustose lichen on stone. Crustose lichens form crusts that tightly adhere to the substrate that they grow on and usually can’t be removed without damaging it.

As its name implies maple dust lichen (Lecanora thysanophora) grows on the bark of maple trees, but also on beech, oak, and basswood. One of the easiest ways to identify this lichen is to look for the white fringe around its perimeter. This is one of those lichens that I never saw until I stumbled across it one day, and now I see it everywhere. This example was about 3/4 of an inch in diameter, or about the size of a penny.

Cumberland rock shield lichen (Xanthoparmelia cumberlandia) likes to grow on boulders and that’s where I found this one. The body (Thallus) is described as being “yellow-green to sometimes bluish green” and the fruiting discs (Apothecia) are “cinnamon to dark brown.” The body of this lichen always looks like someone dripped candle wax on the stone to me.

This is a close up of the apothecia on a Cumberland rock shield lichen. Lichens are made up of a symbiotic relationship between fungi and algae or cyanobacteria. Technically apothecia are “fungal reproductive structures, in which the fungus reproduces itself through the production of spores” This is not the only way that lichens reproduce, but it is common and the apothecia are often beautiful and well worth watching for.

Beard lichens are common enough; they even fall from the trees on windy days, but this beard lichen is growing on stone and that’s very uncommon, in my experience. I think this example must be bristly beard lichen (Usnea hirta,) which can grow on wood or stone, but I must see a hundred growing on wood for each one growing on stone.

There are many different kinds of beard lichens and the differences can be subtle, but the fishbone beard lichen (Usnea filipendula) stands apart because of its resemblance to the backbone of a fish. This lichen seems to prefer growing on spruce but I’ve seen it on other trees as well. Though it isn’t rare I don’t see it often. Lichens in the Usnea genus contain usnic acid and have antiseptic / antibiotic properties. They have been used since ancient times throughout the world to heal wounds.

There are places in these woods where reindeer lichens drift like snow, and in colder climates they lie under the snow for months. As their name implies they are an important food source for reindeer, and they paw through the snow to find and eat them. Reindeer lichen is very slow growing at about an eighth to three eighths of an inch per year and if overgrazed or dug up, it can take decades for drifts like the one pictured to reappear. There are two types in this photo; the green star tipped reindeer lichen (Cladonia stellaris,) and the gray reindeer lichen (Cladonia rangiferina.)

Gray reindeer lichen in this area is silver gray, almost white, with a main stem and branches much like a tiny tree. Each branch tip is a brownish color with a globe or pear shaped fruiting body called a pycnidium. The Native American Ojibwa tribe were known to bathe newborns in water in which this lichen had been boiled, and other tribes drank tea made from it. It has also been eaten, but if you plan on eating lichens correct preparation is everything, because some can cause serious stomach problems.

It’s easy to see how star tipped reindeer lichen comes by its common name; each branch tip ends in a star shaped cluster of four or five branches surrounding a center hole. This lichen seems to be a favorite of reindeer; they will often leave the gray reindeer lichen until last and eat this one first. In Europe this lichen is used in the pharmaceutical industry as an ingredient in antibiotic ointments.

One of the most beautiful lichens that I find growing on stone is the smoky eye boulder lichen (Porpidia albocaerulescens) with its blue apothecia. The blue color seen in the above photo is caused by the way light reflects off a waxy coating on the fruiting bodies, which is very similar to the “bloom” found on plums, blueberries, and grapes. It’s as if pieces of the sky had been sprinkled on the stones when the light is right, but the apothecia can also appear black or gray depending on which direction the light happens to be coming from. The greenish-gold background color is the color of the body (thallus) of this crustose lichen.

I hope this post has shown how beautiful and interesting lichens are, and how easy they are to find. Lichens grow virtually everywhere including on building facades, sidewalks and rooftops, so they can even be found in cities. Many are quite small though, so you have to walk slowly and look closely to find them. Once you’ve seen a few you’ll start seeing them almost everywhere you go.

If you will stay close to nature, to its simplicity, to the small things hardly noticeable, those things can unexpectedly become great and immeasurable. ~Rainer Maria Rilke

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Lichens

 

If you visit a place or places day after day, year after year, you get to know what grows in those places, and that is how I have come to know so many lichens-because I visit them regularly. At this time of year people often think that once the leaves fall there isn’t anything colorful left to see, but that simply isn’t true.  Lichens like the common goldspeck lichen (Candelariella vitellina) in the above photo are here year round for us to enjoy, and once the leaves fall many lichens become even easier to see. Look for this crustose lichen on stone. Crustose lichens form crusts that tightly adhere to the substrate that they grow on and can’t be removed without damaging it.

Bubblegum lichen (Icmadophila ericetorum) gets its name from its bright, bubblegum pink fruiting bodies (apothecia.) I find this crustose lichen growing in large patches on acid, sandy soil in full sun along with blueberries and sweet fern.  It is uncommon and I knew of only two places where it grew. One of those places has been destroyed by logging however, so now there is only one place I know of to find it.

Note: Bob Klips has identified this lichen as Dibaeis baeomyces rather than Icmadophila ericetorum. One of the differences between the two is the length of the stalks that the apothecia sit on. They are longer on Icmadophila ericetorum than they are on Dibaeis baeomyces. Thank you Bob, for the help! If you haven’t visited Bob blog, “Bob’s Brain on Botany,” you should. It’s a real treat and you can find it at bobklips.com

Script lichen looks just like its name suggests but it is a very ancient script, like long forgotten runes. This is another crustose lichen but I find it growing on tree bark rather than stone or soil. The dark “script” characters are its fruiting bodies. There are many script lichen species and each seems to prefer a certain species of tree. I think this example is the common script lichen (Graphis scripta) which prefers smooth barked trees like maple.

One of my favorite lichens is the poplar sunburst lichen ((Xanthoria hasseana). Its fruiting bodies are disc like structures that remind me of orange octopus suckers. This seems to be a perpetually fruiting lichen which hasn’t stopped since I found it about two years ago. It has grown though, and now a little bigger than a quarter.  I think it is one of our more beautiful lichens found in this area. This is a foliose lichen that grows on tree bark, but I’ve never found it on a poplar. Foliose lichens are lobed and leaf like.

Pixie cup lichens (Cladonia pyxidata) look like tiny golf tees or trumpets, and they are also called trumpet lichens. They are common and I almost always find them growing on the sides of rotting tree stumps, often with British soldier and common powder horn lichens (Cladonia coniocraea.) Common powder horn is, curiously, not horn shaped. They are the taller structures in this photo. Pixie cups are squamulose lichens, which means they are scaly, but they are also foliose, or leafy.

When I first found this beautiful little scattered rock posy lichen (Rhizoplaca subdiscrepans) a few years ago it could have sat on a penny with room to spare, but now it has reached quarter size. The orange pad shaped parts are its fruiting bodies (Apothecia,) and the grayish, brain like part is the body (thallus) of this relatively uncommon foliose lichen. By measuring the rate of growth of lichens scientists can get a fairly accurate estimate of how old the rocks are that the lichens grow on. This is known as lichenometry.

Smokey eye boulder lichen is another favorite of mine. The blue color seen in the above photo is caused by the way light reflects off a waxy coating on the fruiting bodies, which is very similar to the “bloom” found on plums, blueberries, and grapes. In addition to blue it can also appear black or gray depending on which direction the light happens to be coming from.  The greenish-gold background color is the color of the body (thallus) of this crustose lichen.

Crustose rock disk lichens (Lecidella stigmatea) look a lot like tile lichens (Lecidea tessellate,) but tile lichens have black fruiting bodies that are sunken, or concave, and rock disk lichens have black fruiting bodies that are raised or flat. These lichens are very common on rocks of all kinds and grow in full sun.

Granite firedot lichens (Caloplaca arenaria) have a gray body (Thallus) and dark orange fruiting bodies (Apothecia,) but the fruiting bodies are so crowded that it’s often hard to see the gray thallus. This is another crustose lichen that doesn’t mind growing on granite in full sun.

Golden moonglow lichens (Dimelaena oreina) can get quite big but I usually find them at dime to quarter size. They grow in groups in full sun on granite and often grow quite close together. The examples in the above photo were fruiting, and that is something I don’t see them do very often. Their apothecia are the dark, cup shaped bodies in the centers of the examples shown. I’ve never been able to find out why so many lichens seem to release their spores so late in the year.

 

I showed toadskin lichen (Lasallia papulosa) in a recent post and quite a few people seemed interested in it, so I thought I’d show it again here and go into a little more detail.  This lichen is very similar to rock tripe lichen (Umbilicaria mammulata) and if it wasn’t for all of the warts it would look very much like it.  The warts are called pustules and on the back of the lichen there is a corresponding pit for every pustule. When wet the greenish color of the algae that is present comes through on the surface. The black dots are its fruiting bodies. Each lichen is attached to the rock at a single point that looks much like a belly button, so this is an umbilicate lichen.

When wet toadskin lichens are rubbery and pliable and feel much like your ear lobe but when they dry out they are much like a potato chip, and will crack just as easily.  Like many lichens they also change color when they dry out, and turn kind of ashy gray like the example in the above photo. Toadskin lichens are also some of the hardest to find-I’ve only seen them growing on hilltop boulders.

However since most lichens grow on trees, soil, rocks, stumps and logs they’re virtually everywhere you go. Many are quite small though, so you have to walk slowly and look closely to find them. Once you’ve seen a few you’ll start seeing them almost everywhere you go. I know of a few that grow on trees right in the heart of downtown Keene.

The trees are coming into their winter bareness; the only green is the lichen on their branches.
~Verlyn Klinkenborg

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Things I’ve Seen

Here are a few more of those out of the ordinary things that I stumble across in my travels.

 

Like the bones of a prehistoric reptile or the ruins of an ancient castle, beard lichens (Usnea) always remind me of the great age and great mysteries of this earth. This one has become an old friend and I visit it often. Most lichens refuse to grow where there is air pollution, so seeing them is always a good sign.

Ground dwelling lichens like this bubblegum lichen (Icmadophila ericetorum) will become covered with leaves and harder to see before too long.  This lichen gets its common name from the bubble gum pink fruiting bodies.

Scattered rock posy lichen (Rhizoplaca subdiscrepans) grows on stones in full sun, so it will be visible all winter long. This is one of my favorite lichens and one of the most beautiful, in my opinion.

Beech trees (Fagus grandifolia) are dropping their ripe nuts now and I saw a few places last week where the forest floor was littered with them.  The chipmunks and squirrels have been busy though, so you find more empty husks than anything else.

If you harvest beechnuts and then leave them alone for a day or two they will open like the one in the photo, and out will drop two kernels. Like many trees and other plants, beech trees will have a year of heavy production, known as a mast year, and then produce very few nuts for a few years afterwards. Since most of the kernels I opened were empty I have to assume that this isn’t a mast year.

The black, shiny wild sarsaparilla (Aralia nudicaulis) berries are ripening. This year has been amazing as far as the bounty of nuts, fruits, and berries I’ve seen. I think the birds and animals will have a good winter with plenty to eat.

Now is the time to turn over the leaves of the common polypody fern (Polypodium virginanum ) to see the naked spore capsules, which are called sori.  Most ferns have a flap like structure called an indusium that protects their spores, so being able to see them exposed like this is unusual. They always remind me of tiny round baskets full of flowers. The Druids though this fern had special powers because of its habit of growing near oak trees. Its roots and leaves have been used medicinally for many centuries and its name appears in some of the earliest herbal and botanical texts.

Common cocklebur (Xanthium strumarium) grows in every state except Alaska and throughout most of Canada. The spiny parts of the plant in the photo hide its tiny female flowers parts. Male flowers can be seen in the upper part of the photo, just to the right of center. I find cocklebur growing on riverbanks but it can also grow in agricultural areas. Since it can be toxic to livestock it isn’t a favorite of farmers and ranchers. Historically it has been used medicinally by Native Americans and was once used to make yellow dye.

Young boys just need something to throw at each other (and rarely at young girls if they’re trying to get their attention) and it’s as if wild cucumber seed pods (Echinocystis lobata) were specifically designed for that purpose. The spines are scary looking but in reality are soft and aren’t really prickly until they are dried. This one reminded me of a small spiny watermelon.

It’s not hard to see where green foxtail grass (Setaria viridis) gets its common name. This grass is a native annual that grows in clumps. Each bristle, called an awn, comes from a single grass flower and through natural rain and frost action burrows into the ground with the seed once it falls from the seed head. These plants are very dangerous to dogs and other animals because the awns, driven by the animal’s normal muscle movements, can burrow into their skin and cause infection and even death if not treated. Dog owners would be wise to rid their yards of any kind of foxtail grass.

This colony of wooly alder aphids (Paraprociphilus tessellatus) on an alder limb was quite large. These insects can be winged or unwinged and need both silver maples and alders to complete their life cycle. Eggs overwinter in crevices in the bark of silver maple trees. In spring, nymphs hatch and begin feeding on the underside of new leaves. In late May through July, they develop wings and fly to alder trees where they feed on twigs and begin reproducing. Soon the colony is composed of aphids in all stages of development and becomes enveloped in white, fluffy wax as seen in the photo. Some aphids mature, return to silver maple trees and mate. Each mated female lays only one egg, which once again starts the overwintering stage.

I watched the sun come up over a local pond recently and it was at the perfect angle for lighting up water lily stems. Since this isn’t something I often see I thought I’d show them here. These leaf stalks are flexible and coil somewhat to allow for fluctuations in water depth.

I visited a different section of the Ashuelot River one day and found that someone had been stacking rocks. Some Native American tribes believed that stacked rocks were a spiritual method of protecting sacred spaces. They were often built near powerful energy sources like springs or places with high numbers of lightning strikes. Piles and stacks had many different shapes and sizes and each meant something different.

This large red oak stood next to a trail I was following one day. It isn’t the biggest I’ve seen but it was big. I leaned my monopod against it to give an idea of its size. A small sign nearby said that its age is estimated to be 300 years, and that it probably was never cut because it grew on a stone wall. Stone walls are boundary markers here in New Hampshire and it is illegal to remove stones from them or alter them in any way unless they are on your land. I can picture the farmers on either side of the wall not cutting the tree because their neighbor might have claimed ownership. That’s the way we do things here-not wanting to bother our neighbor, instead of asking we wait and see, sometimes for 300 years.

Somewhere, something incredible is waiting to be known. ~Carl Sagan

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Things I’ve Seen

This post is another full of those interesting and sometimes strange things that I’ve seen in my travels through the woods.

The trails are much easier to negotiate these days. Just a short time ago there was so much snow here that snowshoes were needed.

 

I came upon some bubblegum lichen (Icmadophila ericetorum) a while ago. This lichen gets its name from the bubble gum pink fruiting bodies. They really stand out against the light blue body of the lichen-even for someone as colorblind as I am. This lichen likes dry, very acidic soil. I often find it growing near blueberry bushes.

 

The naked flower buds of hobblebush (Viburnum lantanoides) have grown large since the last time I checked on them. We should see the beautiful white blossoms within the next two weeks, I’d guess. This is one of my favorite viburnums.

 

Regular readers of this blog know that they won’t see many bird or animal pictures here, but occasionally one will pose for me like this bird did recently. I have a blurry side view that leads me to believe it is an eastern phoebe.  Usually color blindness lets birds and animals blend right into the background when I try to find them, and that’s why I don’t spend a lot of time trying to photograph them.  This day there were several of these little flycatchers darting among the cattails at a local pond, and that made them much easier to see.

 

This robin was bobbing along beside a road I was walking on. It seemed important for him to stay just slightly ahead of me, so we played the game of me trying to catch up to him for a while before he flew off.

Oriental bittersweet (Celastrus orbiculatus) tried to strangle this tree but the tree grew out over the vine and enveloped it, choking it off instead.  Oriental bittersweet was intentionally imported to help with erosion control. Almost immediately, it escaped and began trying to take over the U.S. Once established it is very hard eradicate.

 

This example of an oriental bittersweet was as big as my wrist and like an anaconda, had slowly strangled the life out of the tree it climbed on.

Jelly fungi like this amber one (Exidia recisa) seem to be much more plentiful in winter and spring rather than in summer.  Common names for this fungus include willow brain fungus and amber jelly roll. It always reminds me of canned cranberry jelly.

Yellow jelly fungi (Tremella aurantia) seem more plentiful in the warmer months. I’ve just started seeing them in the woods again after its being absent for most of the winter. Common names for the fungus in the photo include golden ear fungus. It is very similar to yellow witch’s butter (Tremella mesenterica) but has a matte finish rather than a shiny, wet looking finish. It also seems to more closely resemble a brain.

Weeks after seeing the book Photographing Patterns in Nature I’m still finding patterns everywhere. I like the chevron patterns on these small oak buds. I think these were on a black oak (Fagaceae Quercus.) I could have verified this by looking at the inner bark, which is a light orange color, but I didn’t have a knife.

 

Cinnamon ferns (Osmunda cinnamomea) have fuzzy fiddleheads. They look like they’ve been wrapped in wool but deer don’t mind-they will eat all they can find.  This fern gets its common name from its fruiting fronds that turn a cinnamon color after starting life bright green. These fiddleheads stood about 3 inches tall and are the first I’ve seen this spring.

 

I loved the figural grain patterns on this log and wished that I could take it home and make a desk or table from it.  Who wouldn’t want to be able to see such beautiful wood each day?

It isn’t often that I see sedges flowering, so I was happy to see this one. Its grass like leaves, purple bracts and relatively large male staminate flowers at the end of the stalk tell me this plant is one of the carex sedges.  Once I got home and looked at the photo I was even happier to see the shiny leaves of broom moss (Dicranium scoparium) in the background. This moss is one of the easiest to identify because of its grass green leaves. They taper from base to tip and also curve in a continuous arc. Another common name is wind swept moss because of the way that the leaves all appear to be pointing in the same general direction. It is, I think, one of the most beautiful mosses.

The forest makes your heart gentle.  You become one with it… No place for greed or anger there.  ~Pha Pachak

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